Schema for Web Content Accessibility(1.1) An image element should have some descriptive text: an alt or longdesc attribute.(1.1) An input element should have some descriptive text: an alt or longdesc attribute.(1.1) An applet element should have some descriptive text: an alt or longdesc attribute.(1.1) A map element should have some descriptive text: an alt attribute or a link.(1.1) An object element should contain some descriptive text.(1.1) A frame element should have some descriptive text: a longdesc attribute.(2.2) The background color and the foreground color are the same(3.3) Concerning element : B and I are not recommended. Use strong and em, or stylesheets.(3.3) A list should not be used for formatting effects(4.3) The primary language of a
document should be identified. (5.1) A table should have a caption(5.5) A table should have a summary attribute (5.2) Table data should identify
its scope, headers, axis in attributes.(5.6) A table header should have an abbr attribute to give abbreviation(6.4) If you specify an "onmouseup" attribute
on a element,
you should also specify an "onkeyup" attribute(6.4) If you specify an "onmousedown"
attribute on a element,
you should also specify an "onkeydown" attribute(6.4) If you specify an "onclick"
event on a element,
you should also specify an "onkeypress"(6.5) The marquee element is not good HTML(6.5) The blink element is not good HTML
(6.2) A frame should not be a direct image(6.5) If you specify a frame, also specify a
noframes element.(7.1) The
user should control the refreshing of the page(?) A fieldset should have a legend(12.1) A frameset should have a title